Elevator guide



Feb. 28, 1933.

J. DUNLOP ELEVATOR GUIDE Filed Dec. 20, 1929 INVENTOR Jd 77 76'5 Dunlap.

ATTORNEY Patented Feb- 28, 1933 JAMES DUNLOP, or PARK RID E, rntmors,ASSIGNOR ELEVATOR COMBANY,A-CQR-PORATION T0 WESTINGHOUSE, ELEC RIC oinnrnors W ELEVATOR GUIDE Application filed December 20, 1929'. SerialNo. 415,457.

My invention relates to fastening means for guide shoes and hasparticular reference to guide-shoemountings for elevators.

At the present time, elevator guide shoes are rigidly fastened to theelevator in such manner that any shocks or vibration, caused byinaccuracies in, or misalignment of, the guide rails is readilytransmitted to the elevator cab, to the annoyance of the operator andpassengers. The rails may become misaligned at the joints between thesections, causing a slight jolt as the shoes pass from one section toanother or they may warp, causing the car to sway while in motion, thusnarrowing the distance between the car and fixed objects, such as doortreads, rigidly fastened in the hatchway, making it possible for the carto strike these objects whilein motion.

Instances are known where the distance between the respective railsbecomes narrower at some points in the hatchway than at others, due tothe settling of the building, causing the car to slacken its speed whilepassing these points or become wedged altogether between the rails.

No provision is now made for absorption of shock and vibrations ormisalignmentof the rails due to any of the above enumerated causes.

the provision of a non-metallic connection between the car and the guideshoes.

My invention will be described with reference to the accompanyingdrawing wherein Fig. 1 is an elevational view of a conventional-typeelevator cab and sling showing. the guide shoes attached to the car bymeans of my guide-shoe fastening device.

Fig. 2 is a detail perspective view of one of the guide shoesembodyingmy fastening device.

Fig. 3 is a side view, partly in cross-section,

the car.

HIV-III of Fig. 2.

of my fastening device, taken onthe line Referring now. tot-hedrawing'in detail, I

. have illustrated, in Fig. 1, an elevator cab 1 attached to aconventional-type sling having,

heads are'aflixed brackets'3,securely fastened thereto by meansofbolts't and nuts 5, these Guide-rail shoes 9 have lateral extensions10, which, when a shoe is in its operativeposition, engages theprojecting boss 6 upon The cross-sectional diameter of the shoeprojection being-smaller than the internal diameter of the tube likeboss 6, it fits looselywithin the tube. Between this projection on theshoe and the projecting boss, I provide shock-absorbing acousticinsulatingmaterial 11, such as or hose, to prevent contact between themetal parts of the shoe and boss and to make the connection between themflexible. It will be understood that the shoe extensiomaften as bywelding 7, i I and extendmg toward the guide rails 8. I

a rubber tube being surrounded by the shook-absorbing material, snuglyfitswithin the boss.

In order to'strengthen the connection, a

similar shock-absorbing means 12, or rubber proj ecting tube, isdisposed snugly overf'the outside of pro ecting boss and an enlargement-13 the formed upon the shoe projection. A cushion 14 of disposed withinthe hollow boss 6 and the end of the extension 10 upon the guide shoe 9-to cushionthe lateral movement of the guide shoe, Wit-hthisconstruction, there: is no contact between the metal parts of theelevator cab and the guide shoe.-

The operation, ofmy device is as follows;

if the earl is in motion and there should'be ment of the guide railshoes9 in passing from one section of the rail to the: other, thuscausingthe rubber-hoses 1 1 and 12 to shock-absorbing material may be 55at the top and bottom thereof, channel-iron cross heads 2. Tothechannel-iron crossa projecting boss 6 amisalignment between the sectionsof the v rails'8'or manufacturing dcfectsin therail itself, this wouldcauseqa horizontal moveflex horizontally and absorb the click and anyvibration attending the movement of the shoe over the joints of the railsections.

If the rails should move with relation to each other, in such mannerthat they would no longer be parallel, thus causing the dis tancebetween them to be narrower at some point in the hatchwayvthan shoeswould tend to flex vertically, as Wellas slightly compress the rubbertube as the car passes this point, thus compensating for the variance inwithout affecting the speed of the car'in any manner. The same operationof the shoes would ensue should the rails become warped as the shoeswould flex, thus reducing the swaying effect of the cab when passingover the warped sections of the rails.

All vibration, caused by faulty rails being thus absorbed or compensatedfor, will necessarily not be transmitted to the elevator cab. It mayalso be seen that the flexing of the shoes, causing them-to follow thealignment or contour of the rails, will preventiirregular wear at anypoint on both the rails and,

shoes. By using a vibration-absorbing means for connecting the shoes tothe car, a quietly running elevator will result, no vibrations due tofaulty rails within the hatch- =way being transmitted to the car. 7itwill be understood V flexible, non-metallic From the foregoing, that Ihave provided a connection between the guide-rail shoes and the elevatorcab which will enable the shoes to follow the rails under allconditions, which acts as a shock absorber and provides aquietlv-running elevator car.

of my invention, I do not wish to be limited fto the specific structureillustrated, as various modificationsmay be'made within the concentricrelations. v

2. An elevator car, a guide rail, a guide shoe for engaging said rail,lateral extensions on said car and on said shoes, the adjacent ends ofsaid extensions being spaced and overlapping, and vibration-absorbingmeans of yieldable acoustic insulating material be tween saidoverlapping extensions toprovlde a connection therebetween.

8. A car, guide rails for said car, guide tween. said extensions.

at others, the

the distance between the rails Although I have shownthe preferred formnon-metallic member inter- -posed between the adjacent lateral. extensions, whereby they are maintained in spaced.

shoes for engaging said rails, lateral extensions on said car and onsaid shoes, one

of said extensions being telescoped within the other extension andspaced therefrom, and yieldable acoustic insulating means be- 4. Incombination, an elevator guide shoe havlng a laterally extendingportion, a support therefor comprising a bracket, a tubular portionextending laterally therefrom and adapted to telescopically receive theprojecvtion extending from the guide shoe, a nonmetallic cushion memberwithin the tubular extension, and, a yieldable non-metallic tubularmember sli-dably received on the guideshoe extension to. support theextensions in spaced relation, whereby there is no directmetallicconnection between theguide shoe.

and the bracket.

In testimony whereof, I have hereunto subscribed myv name this 4th dayof Dec,

JAMES DuNLor.

